(2S,4S)-5-(tert-Butyl-diphenyl-silanyloxy)-2-fluoro-4-hydroxy-pentanoic acid methyl ester

(3R,5S)-5-(tert-Butyl-diphenyl-silanyloxymethyl)-3-fluoro-3-phenylselanyl-dihydro-thiophen-2-one

Acetic acid (3R,5S)-5-(tert-butyl-diphenyl-silanyloxymethyl)-3-fluoro-3-phenylselanyl-tetrahydro-thiophen-2-yl ester